Mst Electrician Interview Questions and Answers for Freshers

A diesel generator works by converting diesel fuel into mechanical energy, which is then converted into electrical energy.

• Diesel fuel is injected into the combustion chamber of the generator.

• The fuel is ignited by the heat of compression, causing it to combust and expand.

• The expansion of the combusted fuel pushes the piston, creating mechanical energy.

• The mechanical energy is then converted into electrical energy through a generator or alternator.

• The electrical energy produce...read more

A circuit breaker is a device that automatically interrupts the flow of electric current in a circuit to protect against overcurrent or short circuit.

• Circuit breakers are designed to prevent damage to electrical equipment and reduce the risk of electrical fires.

• They work by detecting excessive current flow and quickly opening the circuit to stop the flow of electricity.

• Common types of circuit breakers include thermal, magnetic, and thermal-magnetic circuit breakers.

• Examples o...read more

A transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.

• Transformers are used to increase or decrease the voltage of an alternating current (AC) power supply.

• They consist of two coils of wire, known as the primary and secondary coils, which are wrapped around a magnetic core.

• When an AC voltage is applied to the primary coil, it creates a magnetic field that induces a voltage in the secondary coil.

• Tra...read more

Current is the flow of electric charge through a conductor.

• Current is measured in amperes (A).

• It is caused by the movement of electrons.

• The direction of current flow is from positive to negative.

• Current can be either direct current (DC) or alternating current (AC).